Double seal milk can



Oct. 11, 1949.

J. A. HOPWOOD 2,484,624

DOUBLE SEAL MILK cm Filed Nov. 14, 1945 -7 All i4 E I 6 ill k I .5

M I LK CA N M F 16 v i: I

ll: Hi 2 M I LK CAN INVENTOR. JOHN/LHOPWOOO ATTORNEY Patented Oct. 11, 1949 UNITED STATES PATENT OFFICE "2,484,624 noUBLE SEALIMILKJCA'N J'iihnA. Hupwood, WestfildfN. J. .nppumnnn November 14, 1945,;SeriaLNo. 23,595

(craze-42') Claims. 1

This invention relates to milk cans and more particularly to .milk delivery cans, the invention being especiallydirectedto the cover of the #0811.

.Heretofore .milk delivery cans have {generally been provided with so-called umbrella" covers which comprise a .central section having a rim adapted to extend into thesneckiof the can;and the upper ,portion of which .center section is laterally extended to form an umbrella flange which overlies the'outeredgeof the lip -.or bowl of the can, .so that rain water or other water spilled on top :of thecanoriresultingirommelting of icewill flow off the periphery of the umbrella without-enteringintothe bowl of the neck.

Umbellas of prior cans, however, have been so made as to be spaced some little-distance from the outer edge of the bowl, .which, .in practice, is generally rolled or curled back upon itself to give a reinforcededge.

According to .thegpresent invention, the center section .oithecover embodiesa rim-to fitinto the neck of .the can .as before. The umbrella is vformed of a separate piece securedttothe periphery of the center section and extends outwardly in a radial direction iandismrovidedgat its outer edge with 2. depending skirt, preferably 01: somewhat heavier material and -so positioned with respect to the rim --.of the :cover that, when the rim is fitted into :the neck of a can, the said lip or bowl of :such can=torthereby prcvide a double seal. With this double seal water or .other impurities cannot pass under Lthe :umbrella into the lip or bowl of the canzand thereiis thus provided a much .moresanitary-closure for .the "contents of the can than the-old fashioned umbrellatype of cover could produce. .i lt' theesame time I provide a stronger cover and 20218 "which will better withstand the rough usage to which milk can covers are commonly subjected.

In the preferred embodimenttof the invention, the umbrella section .isin the .form of anannulus provided at both its inner and outer peripheries with flanges. The flange at theinner periphery flange of cylindrical term (and .down tumedflange is half .lapped :into a substantially cylindrical .ring of thicker :section and vfirmly welded .intoplace so that the outersurface .of this wing is. substantially .cylindricalinliormtobetter coast with the .innersurface .of the skirt-of the cover and thus form therewith .a surface seal.

Features of the invention, other than those :advertedto, will be .apparentirom the hereinafter detailed description and appendedclaims, when .read in conjunction with the accompanying drawing.

The accompanying drawing illustrates one practical embodiment of the invention, but the construction therein shown is to be understood as illustrative, only, and not: as defining .thelimits of the invention.

Figure 1 is .a central-section-of a. can and cover embodying the present invention, that portion of the can'below the breast being brokennway.

Figure 2 is a like viewshowing the cover of this.inventionassociated witha conventional can.

:In the drawings, 1 designates .the neck --.oi the can which is superimposed upon .a conventional breast Land is ,provided at its top with a :lip .or

cylindrical.

The coverembodiesacenter section 8 g-provided with a depending rim 9 adapted to have a sliding fit with the interior of the .neck v l .andnrranged peripherally .of the center sectionand ,forming effect a .continuation of its :top, ,is .an vumbrella :Lflhavingat :its inner edge ardownwardlytextend- :ingflange .H andat itsouteriedgea similariflange vt2. The flange .1 I ,is welded .to 1311840114781 surface is welded to the1centersection==of the cover in a of the rim ib-Y welding .metal .13 which .forms ia faceabutting joint while .therflange at the .outer periphery of the umbrella is halfdapped-intotbe skirt to provide a flush Joint, and welded in place so as to eliminate crevices .in which :dilt or other foreign matter m'ightlodge. The ilower or .free edge of the skirt 'is preferably flared cutwardly to give it a'lead whenplacing the cover on the can and is rounded over to produce a smooth edge.

A cover of the character described maybe used with a conventional milk can provided with a curled or rolled edge onrits lip, but I prefer touse this cover in connection witha-novel iorm of lip. This novel form of lip is produced by providing .closed joint without cracks or crevices. ,flange L Z-at the-outerredgeiof-the.nmbrellais fitted intoa rabbet l 4, formed in the outer aipper,.-.nor- \tion .ofa skirt l5 which is of somewhat greater thickness than .the thickness of the stock of the remainder -:of the cover .or of the can. In ,practice, 1 preferably ruse stock of theisame thickness .ior the ring .5.-and the skint .l 5 ,-although the ring it, at its outer periphery, with a down turned will have a sliding fit with the ring 5 and the lower edge of the skirt I is flared outwardly as shown at H, so that these parts may smoothly come into engagement with one another.

When a coverais in place the ring will fit firmly into theflneck whlilefthejskirt l 5 will closely embrace the ring 5, so as to form, in conjunction with the ring, a second seal.

ward taper and the ring 5 and skirtmay be provided with a corresponding upwardtaper, so that the double seal is formed with a tapered fit, adapted to compensate for slight-variationsin can and cover diameters. The stock of, the can and cover, with the exception of the ring 5 and skirt [5, are of sheet metal and there is sufiicient "yield therein'to-compensate for slight irregularities, slight diflerencein'size and wear.

' Figure 1 shows" the preferred form of the invention, wherein the can and cover are arranged for the best coaction; It is possible, however, to use a cover ofthe kind shown in Figure 1 on .a conventionalfform ofcan, such as shown in 1Figure'2, wherein the outer edge of the lip or bowl 3!; is curledasshownat E8. The skirt I5 may coact tangentially of this curled edge, as

shown in Figure-2, to give a line contact which will suffice to produce the second seal, but-is not as efiicientas the structure of Figure 1.

The foregoing detailed description sets forth the invention in its preferred practical form, but

the invention is to 'be understoodas fully commensurate withthe appended claims.

"Having thus fully described the invention, what I claim as' new; anddesire to secure by Letters Patent isi II A'milk can comprising a neck with a superimposed bowl pro'vided at its outer edge with a downwardly extending flange, a ring-embracing said flange and provided with a rabbet' in which the flange is received, said flange being welded in saidrabbetfln combination with a cover having a center section with a rim adapted to 'fit into the neck of the can and provided peripherally with a radially extending umbrella the inner edge'of which is welded to the center section and the outer edge of which is provided with 'a downwardly extending flange, and a skirt rabbeted at its upper 'endto receive saidflange which is 'welded'in place therein, said skirt having an internal diameter adapted to engage with the external surface of the ring on the bowl when the rim-of the cover 'is'introduced into the" neck of thecanm' 2. A milk can cornpri sing a neck with a super- "i'm'p'osed'bowl; provided at its outer edge with a downwardly extending flange; a ringembracing said flange and'provided with a rabbet in which the flange is received; said flange being welded in said rabb'et, in" combination with a cover having a center section with a rim adapted to fit into the neck of the canan'd provided peripherally 'with a ra dially'extending umbrella the inner "edge of which -Its-welded to the center section and the outer edge of which is provided with a downwardlyextending flange, and a skirt rabbeted' at its upper end to receive said flange which is welded in place therein, said skirt having an internal diameter adapted to engage with the external surface of'thering on the'bowl when the riin of the cover is introduced into the neck of the can, said ring being of greater thickness than the thickness of the stock fromwhich the bowl is iiormed.

In practice the, neck, as well as the rim, may have a slight down- 4 3. A milk can comprising a neck with a superimposed bowl provided at its outer edge with a downwardly extending flange, a ring embracing said flange and provided with a rabbet in which the flangeis received, said flange being welded in said rabbt, combination with a cover having a center section with a rim adapted to fit into the neck of the can and provided peripherally with a radially extending umbrella the inner edge of which is welded to the center section and the outer edge of which is provided 'withadownwardly. extending flange, and a skirt 'ing said flange-and provided with'a rabbet in -ternal diameter'adapted to engage with the ex- Number 386,782

introduced into the can.

rabbeted at its upper end to receive said flange which iswelded in place therein, said skirt having an internal diameter adaptedto engage with the-external surface of the ring on the bowl when the'rim'of the covenis introduced into the neck of the can,- said ring being-of greater thickness than the thickness" of the stock from which the "bowl'is formed, and'said skirt being of greater thickness than the'thickness of the stock from which the umbrella-is formed. 7

- 4. "A milk'can comprising a neck with a superimposed bowl provided at its outer edge with a.

downwardly extending flange, a ring embracwhichthe flange isreceived, said flange being welded in said'rabbeu; in combination with a cover having a center section with a rim adapted to fit into the neck-of th'e can and provided peripherally-with a radially extending umbrella,

the outer edge of which is provided with a downwardly extending fla'nge,--and a skirt rabbeted at its upper end to receive said flange which is welded in place thereinfsaid skirt having an internal surface of the ring on the bowl when the of the cover is introduced into the neck of the can. 40" d 5, A milk can comprising a neck with a superimposed bowl having an outer edge which is thickened and reinforced, in combination with a cover having a center section with a rim adapted to-fit' into the neck of the can and provided peripherally with a radially extending umbrella, the outer-edgeof which is provided with a down- "wardly extending'flange, and a skirt rabbeted at its upper end-'to' receive said flange which is welded in plac'e'therein, said skirt having an internal diameter adapted-to engage with the external surface of'the thickened reinforced outer edge of the bowl-when the rim of the cover is 

